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Fuel processing method and system comprising a methanation reactor and a solid oxide fuel cell

A technology of fuel processing and fuel cell stack, which is applied in the direction of fuel cell, fuel cell application, fuel cell integration, etc., and can solve the problem of low cooling efficiency of the stack

Inactive Publication Date: 2008-04-02
HALDOR TOPSOE AS
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, this approach can lead to many problems and pitfalls:
However, the heat of reaction for ethanol reforming is much less endothermic (produces prH 2 ), so the stack cooling provided by the steam reforming of ethanol is less efficient

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  • Fuel processing method and system comprising a methanation reactor and a solid oxide fuel cell
  • Fuel processing method and system comprising a methanation reactor and a solid oxide fuel cell
  • Fuel processing method and system comprising a methanation reactor and a solid oxide fuel cell

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Embodiment Construction

[0032] The following methanation by ethanol refers to the conversion of ethanol to methane-containing, H 2 , CO, CO 2 and water mixture.

[0033] In the fuel processing method of the present invention, ethanol-containing fuel is adiabatically converted to a mixture of methane, hydrogen, carbon monoxide and carbon dioxide, and water. In this way part of the chemical energy contained in the ethanol-containing feed vapors entering the methanation reactor is converted by the methanation reactor into an increase in temperature. This eliminates the need for the heat exchanger normally used to heat the SOFC fuel to the temperature required at the anode inlet. Furthermore, the conversion of ethanol to methane is much less prone to carbon deposition from the feedstock than ethylene and carbon monoxide.

[0034] The ratio of oxygen to carbon (O / C ratio) is very important in methanation reactions because this ratio gives an indication of potential carbon deposition. Ethanol is decomp...

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Abstract

A fuel processing method for a solid oxide fuel cell stack comprising the steps of: (a) supplying a feed stream comprising ethanol to a methanation reactor containing catalytic material for the methanation of ethanol; (b) processing the feed stream in the methanation reactor under adiabatic conditions to produce an effluent fuel comprising methane; (c) transferring the effluent fuel comprising methane to the anode of a solid oxide fuel cell stack comprising at least one solid oxide fuel cell; (d) providing the cathode of the solid oxide fuel cell stack with an oxygen-containing gas; and (e) converting the fuel comprising methane and the oxygen-containing gas to electricity in the solid oxide fuel cell stack.

Description

[0001] The invention relates to a processing method of ethanol-containing liquid fuel and a system for implementing the fuel processing method. Background technique [0002] Ethanol is an attractive fuel for SOFCs that combine heating and power generation, such as auxiliary power units for trucks and ships. Potential fuel processing steps in such devices could end up being very simple ethanol vaporization and injection into the anode compartment of the SOFC. [0003] However, this approach can lead to many problems and pitfalls: [0004] Saunders, G.J. et al (Formulating liquid hydrocarbon fuels for SOFCs), pages 23-26, Journal of Power Sources volume 131, chapters 1-2, pages 1-367 (2004 May 14)) showed that dry ethanol under normal conditions is extremely easy to carbonize in the SOFC anode chamber using the most active Ni-ceramic as the anode material, resulting in the inactivation of the SOFC after several hours of operation. It is well known that under steam reforming co...

Claims

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Application Information

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IPC IPC(8): H01M8/06H01M8/04H01M8/10H01M8/24H01M8/00
CPCY02E60/521Y02T90/32H01M2250/20H01M2250/405H01M8/0637H01M8/0662Y02E60/525H01M8/0631H01M8/04097Y02B90/16H01M8/1246H01M8/0612Y02B90/10Y02E60/50Y02P70/50Y02T90/40H01M8/04H01M8/06
Inventor J·B·汉森S·达尔
Owner HALDOR TOPSOE AS
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